PEG- and peptide-grafted aliphatic polyesters by click chemistry

Area of Science:

• Polymer Chemistry
• Biomaterials Science

Background:

• Aliphatic polyesters are versatile biomaterials.
• Grafting functionalities onto polymer backbones enhances material properties.
• Click chemistry offers efficient and mild conjugation methods.

Purpose of the Study:

• To synthesize novel aliphatic polyesters with pendent acetylene groups.
• To functionalize these polyesters with poly(ethylene glycol) and oligopeptide moieties using click chemistry.
• To evaluate the biocompatibility of the resulting graft copolymers for biomaterial applications.

Main Methods:

• Controlled ring-opening polymerization of alpha-propargyl-delta-valerolactone and epsilon-caprolactone.
• Copper(I)-catalyzed azide-alkyne cycloaddition (click chemistry) for grafting.
• In vitro cytotoxicity evaluation for biocompatibility assessment.

Main Results:

• Synthesis of aliphatic polyesters with tunable acetylene graft density.
• Successful grafting of poly(ethylene glycol) and oligopeptide chains via click chemistry.
• Demonstrated biocompatibility of the amphiphilic graft polyesters.

Conclusions:

• The developed method provides a versatile route for functionalizing aliphatic polyesters.
• The biocompatible graft copolymers are suitable for various biomaterial applications.
• Tailorable polymer architecture enables precise control over material properties.